表单中的小数值在Django中无效

Question

这是我正在使用的表单，我想通过它传递两个字符字段和两个坐标，这样它们就可以变成对象。我刚刚搞定了字符字段的验证，但现在小数字段却不工作。有什么建议吗？

from django import forms


class SubmitForm(forms.Form):
title = forms.CharField(max_length=100)
story = forms.CharField(max_length=3000)
lat = forms.DecimalField(max_digits=25, decimal_places=20)
lng = forms.DecimalField(max_digits=25, decimal_places=20)

def clean_title(self):  
    if len(self.cleaned_data['title']) < 4:
        raise forms.ValidationError("Enter your full title")
    # Always return the cleaned data
    return self.cleaned_data['title']


def clean_story(self):
    if len(self.cleaned_data['story']) < 4:
        raise forms.ValidationError("Enter your full story")
    # Always return the cleaned data
    return self.cleaned_data['story']

def clean_lng(self):
    if self.cleaned_data['lng'] == 0.0:
        raise forms.ValidationError("Enter your full story")    
    return self.cleaned_data['lng']

def clean_lat(self):
    if self.cleaned_data['lat'] == 0.0:
        raise forms.ValidationError("Enter your full story")
    # Always return the cleaned data    
    return self.cleaned_data['lat']     



def clean(self):
    cleaned_data = self.cleaned_data
    return cleaned_data

这是我的视图

def test(request):
ctxt = {}
if request.method == 'POST':
        form = SubmitForm(request.POST) # A form bound to the POST data 
        if form.is_valid():
            lat1 = form.cleaned_data['lat']
            lng1 = form.cleaned_data['lng']
            # title1 = form.cleaned_data['title']
            titlepost = form.cleaned_data['title']
            story1 = form.cleaned_data['story']
            ctxt = {'titlehere':titlepost}
            catid = "test1234"
            cat = Category(category=catid)
            cat.full_clean()
            cat.save()
            marker = Marker(lat=lat1, lng=lng1,category=cat, title=titlepost, story=story1)
            marker.full_clean()
            marker.save()
            return render_to_response('home.html', ctxt, context_instance=RequestContext(request))          

        else:
            return render_to_response('test.html', ctxt, context_instance=RequestContext(request))          
else:
        now = datetime.datetime.now()
        form = SubmitForm()
        latest_marks = Marker.objects.all().order_by('-submitted')[0:10]
        ctxt = {
        'marks':latest_marks,
        'now':now.date(),
        'form': form,
        }

        return render_to_response('test.html', ctxt, context_instance=RequestContext(request))

每次我提交表单时，都会收到这个错误信息

我不太确定发生了什么。我对Django还很陌生。任何帮助都非常感谢。

编辑：我加上了之前缺少的冒号，但错误依然存在

Answer 1

不知道为什么，每次我提交表单时都会收到这个错误信息。

我看不出错误在哪里！不过我试了这个方法，结果没问题。

import math
class MyForm(forms.Form):
    title = forms.CharField(max_length=100, min_length=4)
    story = forms.CharField(max_length=3000, min_length=4)
    lat = forms.DecimalField(max_digits=25, decimal_places=20)
    lng = forms.DecimalField(max_digits=25, decimal_places=20)

    def clean_lat(self):
        lat = self.cleaned_data['lat']
        if math.ceil(float(lat)) <= 0:
            raise forms.ValidationError("Enter your full story")
        return self.cleaned_data['lat']

    def clean_lng(self):
        lng = self.cleaned_data['lng']
        if math.ceil(float(lng)) <= 0:
            raise forms.ValidationError("Enter your full story")
        return self.cleaned_data['lng']

Answer 2

你有没有考虑过使用 Modelforms 呢？

使用 Modelforms 可以让你的代码变得更简单，比如说对 Marker 模型使用 Modelform，这样可以减少代码重复，整体上也能少写很多代码来创建模型……

顺便提一下：你可以给 CharField 发送 min_length 参数，这样就能免费获得长度验证功能哦 :)

class SubmitForm(forms.Form):
     title = forms.CharField(max_length=100, min_length=4)

Answer 3

你在表单的清理方法里的if语句后面缺少了一些冒号。